DIR not visible from attached sap object and validation check problem

Hi Experts,

I have created new sap object link for table BUT000 and transaction code is BP.

Now

1) when I am creating DIR through CV01N, I am able to view Object link column with one filed called PARTNER.

If I enter wrong or Invalid partner here, system is not performing any validation, it accepts it and if I save DIR it gets saved with invalid business partner.

2) secondly lets say i have entered valid business partner and saved the DIR, then in transaction code BP, I am not able to view any DIR for that business partner.

Need your valuable Input on this.